Update README with C++23 support and GCC 14 info

Added note about C++23 support and optional GCC 14 installation instructions.

Author: SiskaPavel

README.md

@@ -60,6 +60,8 @@ This lets you customize the build by enabling optional plugins and features as n
 
 **Note:** Some plugins may require additional dependencies beyond the basic requirements.
 
+⚠️ C++23 support required: Make sure your compiler supports C++23 (GCC ≥14 recommended).
+
 ### RHEL/CentOS:
 
 #### 🧰 Requirements
@@ -75,6 +77,16 @@ $ dnf install gcc-toolset-14-libatomic-devel
 $ dnf install libatomic
 ```
 
+#### 🟢 Optional: Install GCC 14 (for C++23 support)
+```bash
+# Enable devtoolset
+$ dnf install gcc-toolset-14
+$ scl enable gcc-toolset-14 bash
+
+# Verify version
+$ g++ --version  # should show GCC 14.x
+```
+
 ### Debian/Ubuntu:
 
 #### 🧰 Requirements